SOLVED: Some Movies Won't Play on Android TV but works on other devices (web browser, phone)

[theguymadmax]

Jellyfin versions:

• Server version: 10.11.0
  
• Web version: 10.11.0
  
• Build number: 2025021314
  

Oh I just realized you're using the the unstable build.  Jellyfin is in the process of a major EFCore refactor. Here are a few posts about it:
https://jellyfin.org/posts/efcore-refactoring-incoming
https://jellyfin.org/posts/efcore-refactoring

Here are known bugs so far:
https://github.com/jellyfin/jellyfin/issues/13047

This one looks like yours:
https://github.com/jellyfin/jellyfin/issues/13570

Luckily this one has been fixed already. You need to update to the latest unstable build. There are still a ton of bugs to be worked out, so be prepared for issues as linked above.